Kinda of depends on your budget.
If you have the cash I would go with a vortech mp40. If youre on a budget I happen to favor Koralias.
I have 2 1400 koralias in my 6 foot 125g and a 950 aqueon and a 750 koralia too. lol I like the flow just fine. You might want to consider 2 high power ones, the one vortech or maybe 3 or 4 smaller flow ones to get the coverage from top to bottom since youve got a decently deep tank.
Just my thoughts.